title: Photocatalytic ozonation of dimethyl phthalate with TiO2 prepared by a hydrothermal method.
abstract: TiO(2) was prepared by a hydrothermal method at a low temperature and used to degrade and mineralize dimethyl phthalate (DMP). TiO(2) was characterized by XRD, TEM, BET and UV-vis techniques. The characteristics of TiO(2) prepared by a hydrothermal method (h-t TiO(2)) included a good crystalline anatase phase, greater surface area, stronger absorption to UV light wavelength and lower agglomeration than TiO(2) prepared by a classic sol-gel method (s-g TiO(2)). The photocatalytic activity of h-t TiO(2) prepared under optimal hydrothermal condition (180°C for 10h) was 2.5 times higher than that of s-g TiO(2) in degrading DMP. The process of photocatalysis combined with UV irradiation and ozonation (TiO(2)/UV/O(3)) considerably improved the mineralization and degradation of DMP compared to photocatalysis combined with UV irradiation (TiO(2)/UV), ozonation combined with UV irradiation (UV/O(3)), and ozonation alone (O(3)). A kinetic study showed the mineralization in TiO(2)/UV/O(3) followed the Langmuir-Hinshelwood model.
authors.affiliation: School of Chemistry & Environment, South China Normal University, Guangzhou 510006, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Jing
authors.forename: Laisheng
authors.initials: L
authors.lastname: Li
authors.forename: Qiuyun
authors.initials: Q
authors.lastname: Zhang
authors.forename: Ping
authors.initials: P
authors.lastname: Lu
authors.forename: Peihong
authors.initials: P
authors.lastname: Liu
authors.forename: Xianghong
authors.initials: X
authors.lastname: Lü
mesh_terms: D002384:Catalysis; D004785:Environmental Pollutants / Q000737:chemistry*; D007302:Insect Repellents / Q000737:chemistry; D010126:Ozone / Q000737:chemistry*; D055668:Photochemical Processes; D010795:Phthalic Acids / Q000737:chemistry*; D010968:Plasticizers / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D004785:Environmental Pollutants; D007302:Insect Repellents; D010795:Phthalic Acids; D010968:Plasticizers; C024629:dimethyl phthalate; C009495:titanium dioxide; D010126:Ozone; D014025:Titanium